SELKIRK INC 3VP-36 - PIPE PELLET VENT 3X36IN GALV - ENGINEERED FOR PELLET AND CORN BURNING STOVES. COUPLING JOINT CONNECTS IN SECONDS TO ASSURE JOINT INTEGRITY. GASKETED JOINT DESIGN. PAINTED PIPE LENGTHS AVAILABLE FOR INTERIOR USE. INNER WALL 304 STAINLESS STEEL, OUTER WALL PAINTABLE GALVANIZED. ROLLED-OVER MALE END ELIMINATES SHARP EDGES. 1 IN CLEARANCE TO COMBUSTIBLES. REMOVABLE TEE CAP FOR INSPECTION AND CLEANING. INTERNAL SPACING BEAD ASSURES UNIFORM INSULATING AIR SPACE BETWEEN PIPE WALLS. TESTED AND LISTED BY UNDERWRITERS' LABORATORIES, INC, IN ACCORDANCE WITH UL-641 STANDARD FOR LOW TEMPERATURE VENTING SYSTEMS AND APPLICABLE REQUIREMENT - EQUAL TO 8273898